My HP Laserjet 2200 prints perfectly except it does not print the letters ';k'; and ';m';. How do I resolve this?

I tried updating drivers but it still does not seem to workMy HP Laserjet 2200 prints perfectly except it does not print the letters ';k'; and ';m';. How do I resolve this?
the printers firmware is corrupt contact hp and see how to refresh it---if that dont work buy a new printer